libvirt 4.8.x Permission information disclosure

CVSS Meta Temp Score
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CTI Interest Score
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5.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in libvirt 4.8.x. Affected by this issue is some unknown functionality of the component Permission. This manipulation causes information disclosure. This vulnerability is tracked as CVE-2019-3886. The attack is only possible within the local network. No exploit exists.

Detailsinfo

A vulnerability classified as critical was found in libvirt 4.8.x (Virtualization Software). Affected by this vulnerability is an unknown functionality of the component Permission. The manipulation with an unknown input leads to a information disclosure vulnerability. The CWE definition for the vulnerability is CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

An incorrect permissions check was discovered in libvirt 4.8.0 and above. The readonly permission was allowed to invoke APIs depending on the guest agent, which could lead to potentially disclosing unintended information or denial of service by causing libvirt to block.

The bug was discovered 04/05/2019. The weakness was disclosed 04/04/2019 as confirmed bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2019-3886 since 01/03/2019. The exploitation appears to be easy. The attack can only be done within the local network. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1592 for this issue.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 172276 (SUSE Enterprise Linux Security Update for libvirt (SUSE-SU-2019:0948-1)).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 107777†). The entries VDB-132548 and VDB-135361 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 6.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
NVD Vector: 🔍

CNA Base Score: 5.4
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Information disclosure
CWE: CWE-200 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

01/03/2019 🔍
04/03/2019 +90 days 🔍
04/04/2019 +1 days 🔍
04/05/2019 +1 days 🔍
04/05/2019 +0 days 🔍
08/27/2023 +1605 days 🔍

Sourcesinfo

Advisory: USN-4021-1
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2019-3886 (🔍)
GCVE (CVE): GCVE-0-2019-3886
GCVE (VulDB): GCVE-100-133057
SecurityFocus: 107777 - libvirt CVE-2019-3886 Security Bypass Vulnerability

See also: 🔍

Entryinfo

Created: 04/05/2019 09:05
Updated: 08/27/2023 07:17
Changes: 04/05/2019 09:05 (61), 05/25/2020 17:52 (4), 08/27/2023 07:10 (3), 08/27/2023 07:17 (12)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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